1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87af879c6ae1d4e6695b6a7ca8a1c3e30a85941b3ac6be1d32339a92790d712. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1f422c9-42e5-466c-afed-d0baa6ea50b8.json and https://artists.proofprofile.net/proofs/artist/e1f422c9-42e5-466c-afed-d0baa6ea50b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1479d280891ba09c98de6b0d6d71b495830dd781e491dac2da161bdb6f1319e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae782bd84d82f6724579355667673d7fc4ed8c2a08022721533ab0a367235a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6300d0a22f51c59bcad5fff272824d7d66d31b86e8ba927133d233619e313ad7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e84385862f46f9e4168f7ddbe47c9b5c270974d3ea63994f3acadb1fff6ebe4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961838.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c3af2427855d5aba9e4da293c6fc297f5dae458d8da2b14c68cccdc6e1d051. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b0452940c671282a70a38a79c5cbcbaeb825b373aa34d4bcd63b447787a22d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412c45ad186b35f90df15f3a2ef70f9ad4efb1456563ecb4f424daafed1f2ce8. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7342bf7a08215e7ed53432a30d1d114dcba634d660dfba90a051f78b31456b2e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe067d4a0508c52efb15d259d5b282cc074c12f92edc1f231f9db59f56c13dbc2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d85e15cc25bbb3a6320b1952a0b723ddbf58b4f5d6bb2ca56fa1d6ab6b1f8c5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7405ffb64b3ba19da748c6d6e3636714432dce9e54bf897601beff33c353d39. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80c81d98b1bd98a72674ed0b7ea7c5528dc64fbc033ce573bc48539c4dc3772. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab90b5081fe0aa0e7aad135eecf13c524b0c84ebf75bf59c77a5248813d6b32. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81961854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e96e610f854ac740e08a42696bd113df2e52805f3f594dfe0a82b6817d5caa5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cfa8173b513cb937e794a74a35455feb95c2c9fad73c9fbf751cbd6f9ba326. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d77e0b5c046349612d1a6aba30abae557dd13dddadb9d70a451d50ccfdf064. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb94c7966b7367eac1088b2a712f28c090e95f5e9151b18313f2f6755816bb76. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2545d24cd23d073e9fa80882c3c6e40ecc9ae0a8dc9c4aac1ddad5c8119fd247. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dbaca21083abd8b977eb78a0a7739bf0f8fabaf16d4da27472f1a916e1cbee. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66e48a062f8e9dbbb5b719aa1022d3a9c33c5952c81450d0279c0ec37cb767a. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a1427cf6fd360b56ad24bddc0309c87012d609752ad98f85479874013b1388. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61a37774ab3037743d8e2ed34f09e38612d8f7a3217f9ab8ab911c5e4ae8cd0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607524e39cbf178b4814f816621636df1a73e43d322eb4bfc5e35f6fcc226f6f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c880fe8a53c971e51aaaf9566ce49d87942bad5f511fb40da06711c46c6f26c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62267120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e937e2c5092e931b643c48424c10c8af97f0eac13c674cce8a99b1b4e73dca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81806227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb79418b9b9570ff13fba99be761f7293fa8fd7d28e8c3892c4b2e12a0fdd75. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81806228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035a4a7133acca1bfed8c5859fb735d0316c71e590517c664b3725c5c38c3c52. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81806229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f4965b4a62a7fa87ec67fc018330818ff59d28fae9768713b28eecbeb2bb62. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81806231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9ca3721b6e9b391363626476005a5e6ca9c155579f4ea0be822326aae6cb89. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81806232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8d8470f6c97865ead56bca0bb106555037ae2392bfada6b6fdd2878569890a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81806230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc626d3a7f3ab7484aee40fd3bd3d24e734fbf71042711cc6049a6502b2e11c3a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81806234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ba20c0495d1816514406fa7ba0755c070e35e0bacdc3adee0dc1b4c3c3f56f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81806235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067c87324874ade20f0dbaf7bf46280bc9b686cfa0884414f77681ca0633f36d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6785386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13afc7a246f4525f6304a0d5e9a98984ee0048e2b09cf54abd80e94f80628675. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62385135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb522458194a9aa76e1f5472e5a2a54f571beac39fdaaec603912f2459f57c395. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62364051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff443279dd17820c5f498be4e555f6054c84f743edd9e7f31123b62eb28736d1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62322964.